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Analysis
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max time kernel
150s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
02/05/2024, 01:09
Behavioral task
behavioral1
Sample
2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
Resource
win7-20240419-en
Behavioral task
behavioral2
Sample
2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
Resource
win10v2004-20240419-en
General
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Target
2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe
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Size
32KB
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MD5
d17a004e8e71293bb1b62009372aec4b
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SHA1
a4b729d22023c085731e0e5eeda230c446c911ce
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SHA256
d664dba3b79d06c9a4f4b4d835f7778e1103ad2778dae5e3b782411f950fca8f
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SHA512
14687c0bc78b72d837410e282354b1068f115a256c920b719411250feef0510169d232a8752ea05b614794c0b4d4dae91d5cb713ccd6f72e5d1a4bf5b8bf594e
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SSDEEP
768:bFPm5zusFUB2preAr+Ofjg0S16avdrQFiLjJvtXs:bFPmpiif/oc+vXs
Malware Config
Signatures
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Detection of CryptoLocker Variants 5 IoCs
resource yara_rule behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/files/0x000c000000023b47-13.dat CryptoLocker_rule2 behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp CryptoLocker_rule2 -
UPX dump on OEP (original entry point) 5 IoCs
resource yara_rule behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/files/0x000c000000023b47-13.dat UPX behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp UPX behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp UPX -
Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
description ioc Process Key value queried \REGISTRY\USER\S-1-5-21-2818691465-3043947619-2475182763-1000\Control Panel\International\Geo\Nation 2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe -
Executes dropped EXE 1 IoCs
pid Process 4156 lossy.exe -
resource yara_rule behavioral2/memory/3076-0-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/files/0x000c000000023b47-13.dat upx behavioral2/memory/4156-19-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/3076-18-0x0000000008000000-0x000000000800E000-memory.dmp upx behavioral2/memory/4156-28-0x0000000008000000-0x000000000800E000-memory.dmp upx -
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
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Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 3076 wrote to memory of 4156 3076 2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe 85 PID 3076 wrote to memory of 4156 3076 2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe 85 PID 3076 wrote to memory of 4156 3076 2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe 85
Processes
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C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-02_d17a004e8e71293bb1b62009372aec4b_cryptolocker.exe"1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:3076 -
C:\Users\Admin\AppData\Local\Temp\lossy.exe"C:\Users\Admin\AppData\Local\Temp\lossy.exe"2⤵
- Executes dropped EXE
PID:4156
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
33KB
MD55ce73566a6771a62aed67f981e73b0ab
SHA14b1b82ecd1446068f75cb2860ab042f6efc511df
SHA256c5aba6c3bdd4ab8922cc9a0bea075e45a062bfb14d289285ff0555d3518dfdfb
SHA512145d92ebbf3e60f8015cc24ece58aaa4b0f06e687398b1d880599ab253f13542a9cb5d1561a0aeb67da7a0442ec1d29358a8c08c6148bf98cfeeb619a2c46a9f